Method of deodorizing



Patented- June 28 A "STATES PATENT OFFlCE METHOD or osooomzmo x Elmer M. Davis, Chicago, 111., assignor to Industrial Patents Corporation, Chicago, 111., a corporation of Delaware Application December 29, 1934, Serial No. 759,623 g 11 Claims. (01. 99-61) This invention relates to a method for deodorizing a fluid.

One of the objects of the invention is to provide a method for removing objectionable odors 5 from a fluid. Another object of the invention is to provide a method for removing objectionable odors from cream.

Another object of the invention is to remove 10 onion odors and flavors from cream.

Other objects of the invention will be 'apparent from the description and claims which follow.

During portions of the pasturing season large quantities of cream are received at creameries 15 fromwhich an inferiorgrade of butter is produced due to flavors and odors derived from onions, strong grasses weeds and the like cons'umed by the cows. Careless handling, improper storage and the like also result in the developg9 ment of unpleasant, undesirable flavors and odors in'cream, many of which are carried over into the butter churned from the cream.

My copending application entitled Method of deodorizing milk and cream, SerialNo. 741,483,

3 filed August 25, 1934, describes a high temperature method ofdeodorizing fluids such as milk and cream.- However, ,it is' sometimes desired not to, subject the fluid to the extremely high term 7 peratures disclosed inmy said copending appli-' I cation and the present invention involves a method of deodorizing by the use of live steam which does not involve heating the cream to extremely high temperatures.

The method of the present invention has been 3 found to be effective in the removal of many of the objectionable odors found in cream, which odors are carried over into butter churned from the cream unless removed before the'cream is churned. v 40 The apparatus employed in the method of the present invention is described and claimed in my copending divisional application Serial No. 18,628, filed April 27,1935, entitled Deodorizer, which application 'issued June 22, 1937 as Patent No.

The invention may be better understood by reference to the accompany g drawing in which similar reference characters in the figures identify similar parts. 5 Figure 1 is a perspective view showing one form of apparatus which may be employed in the method of the present invention. Figure 2 is a. sectional detail view of the top of;

lows, the'method of the present invention may be carried out with a modified flash pasteurizer comprising a closed cylindephaving a centrally located drive shaft supporting an agitator and scraper blades. The drive shaft is'drilled with 5 a plurality of holes to admit steam under pressure.- v

The cream swirling upwardly on the inner wall of the cylinder in the form of a'thin film is treated by impinging a jet of gas emitted by the holes in the drive shaft. a

The cream is introduced into the device at a temperature of. about. 185 Fahrenheit, which is.

ordinarypasteurizing temperature, the temperature of the cream being raisedby the steam to about 210 Fahrenheit.

The invention maybe more clearly understood by reference to the drawing:

a Deodorizer l is'mounted upon housing 2 supported by feet 3. Cream at' pasteurizing tempershown, mounted in the portion 9 of the housing 2. 2

Dasher sleeve Ill ,is mounted upon and rotates with shaft 'l. Dasher arms H affixed to dasher sleeve l0 carrydasher blades. l2 which in operation cause the liquid to be swirled upwardly and driven out through line 13 by impeller blades I4 which are also mounted upon shaft 1 and rotate therewith. v

As will be seen by reference to Figure 2, shaft 1. is provided with a plurality of holes l5 through which jets of steam are directed against the inside wall of deodorlzer I to treat the film of cream swirling upwardly thereon when the device is in operation. Steam is provided to shaft 1 through line l6 from a source not shown. The steam enters at packing gland II. It will be understood, of course, that a packing gland is also provided at Deodorizer I is provided with a cover l9 which may be fixed to the top of deodorizer l as by screws 20. Steam and odors escape from the deodorizer I through a plurality of'holes 2| in the lower plate 22 of cover l9 and pass from chamber 23 through line24, exhaust fan 25 and line 26 to the outer atmosphere.

The device of the present invention provides an unusually efflcacious apparatus which is inexpensive to construct and simple in operation; be-

. ing dependent for its success upon the direct impingement of live steam upon a moving film of cream and not upon or of a vacuum.

In practice I prefer to add buttermilk to cream in sumcient quantities to thin the cream down to about twenty-five per cent butter fat, at which consistency I have found that the undesirable odors volatilize more readily.

The method of the present invention may be used to entirely deodorize cream tainted with numerous types of odors and may be used as auxiliary to other deodorizing methods in the case of odors which are extremely tenacious and diflicult to dissipate.

The method of the present invention may be carried out successfully without danger of the development-oi cooked or burned flavors or of caramelizing the milk sugar. G

It will be noted that in the preferred manner of carrying out the invention the cream is preheated to pasteurizing temperature and isat a pasteurizing temperture when treated with the live steam and that consequently the steam treatment does not involve any violent temperature changes.

Although the present invention has been described as employed with deordorizing cream it will be understood that it may be used for the treatment of any fluid from which it is desired to draw oil odors in the form of volatile gases.

After treatment in the deodorizer, the cream or fluid is drawn oil? and cooled in any desired manner preparatory to churning or other treatment.

, I claim:

1. The method of deodorizing fluid which comprisespreheating the fluid, causing the fluid to travel in a thin film, impinging jets of steam against said travelling film of fluid and immediately and continuously removing steam and volatile gases.

2. The method of deodorizing fluid which comprises heating the fluid to flash pasteurizing temperature, causing the preheated fluid to travel in the form of a film, impinging Jets of steam against said film of fluid and immediately and continuously drawing ofl steam and volatile gases.

3. The method of deodorizing fluid which comprises heating the fluid to flash pasteurizing temperature, conducting thefluid into an open chamber, inner surface of the said chamber in the form of a film, impinging jets of steam against said travthe use of unusual pressures elling film of fluid and immediately and continuously drawing 01! steam and volatile gases.

4. The method. of deodorizing cream which comprises heating the cream to flash pasteurizing temperature, conducting the cream into an open chamber, causing the cream to travel over the inner surface of the said chamber in the form of a film, impinging jets of steam against said travelling fllm of cream and immediately and continuously drawing ofl steam and volatile gases from said chamber.

causing the fluid to travel over the,

5. The method of deodorizing cream which comprises passing the cream in the form of a fllm under pressure through a chamber, impinging jets of steam against the moving film of cream while in said chamber, and immediately and continuously drawing off steam separately from the cream.

6. The method of deodorizing cream which comprises heating the cream to flash pasteurizing temperature, conveying the heated cream to an open chamber, forcibly impinging the cream against a baiiie plate in the bottom of said chamber, swirling the cream up the walls of the chamber in the form of a movingfllm, impinging jets of steam against said moving fllm, drawing off steam and volatile gases and conveying said cream from said chamber.

7. The method of deodorizing cream which comprises heating the cream to flash pasteurizing temperature, conveying the heated cream to an open chamber, forcibly impinging the cream against a bailie plate in the bottom of said chamber, swirling the cream up the walls of the chamber in the form of a moving fllm, impinging jets of steam against said moving fllm, drawing ofi steam and volatile gases and conveying said cream from said chamber, and thereafter cooling the said cream.

8. The method of deodorizing cream which comprises preheating the'cream to flash pasteurizing temperature, moving the cream in the form of a thin film over the walls of an open chamber and impinging jets of steam against said moving fllm of cream in suflicient quantities to raise the temperature of the cream to approximately 210 Fahrenheit, drawing ofl steam and volatile gases and conveying said cream from said chamber.

9. The method of deodorizing cream which comprises preheating the cream, causing the cream to travel in a thin film, impinging jets of steam against the travelling film of cream and immediately and continuously removing steam and volatile gases.

10. The method of deodorizing cream which comprisesheating the cream to flash pasteurizing temperature, causing the preheated cream to travel in the form of a film, impinging jets of steam against the fllm of cream and immediately and continuously drawing of! steam and volatile gases.

11. The method of deodorizing fluid which comprises heating the fluid to flash pasteurizing temperature, conveying the heated fluid to an open chamber, forcibly impinging the fluid against a baflie plate in the bottom of the chamber, swirling the fluid up the walls of the chamber in the form of a moving film, impinging jets oi steam against the moving fllm, drawing oil steam and volatile gases and conveying the fluid from the chamber.

- EIMER M. DAVIS.

and volatile gases 

